CN108191032A - A kind of inorganic chemistry liquid waste processing recovery vehicle - Google Patents
A kind of inorganic chemistry liquid waste processing recovery vehicle Download PDFInfo
- Publication number
- CN108191032A CN108191032A CN201810068473.3A CN201810068473A CN108191032A CN 108191032 A CN108191032 A CN 108191032A CN 201810068473 A CN201810068473 A CN 201810068473A CN 108191032 A CN108191032 A CN 108191032A
- Authority
- CN
- China
- Prior art keywords
- blending bin
- liquid
- recovery vehicle
- solenoid valve
- inorganic chemistry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
Abstract
The invention belongs to chemical waste fluid reclaimer technical fields, more particularly to a kind of inorganic chemistry liquid waste processing recovery vehicle, recovery vehicle ontology including double-layer structure, recycle of alkali liquor case, neutral solution recycling bins, acid solution recycling bins and blending bin are installed on recovery vehicle ontology, flow rate of liquid control device is mounted between recycle of alkali liquor case and blending bin, between acid solution recycling bins and blending bin, filtering absorption layer is installed in liquid storage bottle；The bottom of blending bin is also communicated with drain pipe, and liquid pump is equipped on drain pipe；PH sensors on the madial wall of blending bin are installed, are internally provided with agitating paddle, the head cover lower surface of blending bin is equipped with adsorption layer, buzzer and microcontroller are equipped on the lateral wall of blending bin.The inorganic chemistry liquid waste processing recovery vehicle of the present invention requires no knowledge about the volume and pH of acid waste liquid and alkaline waste liquor for participating in reaction during the reaction, encounter discharge acid solution and lye pH it is unfixed when, can accomplish accurately to neutralize acid waste liquid and alkaline waste liquor.
Description
Technical field
The invention belongs to chemical waste fluid reclaimer technical fields, and in particular to a kind of inorganic chemistry liquid waste processing recycling
Vehicle.
Background technology
Can usually encounter the recycling problem of experiment waste reaction solution during Experiment of Inorganic Chemstry, these waste liquids have it is acid and
Point of alkalinity, since acid and alkaline waste liquor is larger to reclaimer and environmental disruption effect, therefore need by after acid-base neutralization again
It is discharged, therefore the soda acid reclaimer of profession is particularly necessary.
Chinese patent CN206407959U discloses a kind of inorganic chemistry liquid waste processing recovery vehicle, including pedestal, matrix
With the collection table being set to above matrix, collecting box A, collecting box B and collecting box C are provided in collection table, is set in collection table
There are acid solution collecting tank, lye collecting tank and neutralizing tank, further include liquid suction device, be used cooperatively between these components, it can
To accomplish to separate and collect waste liquid, accurate quantification disposes waste liquid, and solves traditional waste liquid recovery apparatus and separates treatment acid solution and lye,
It can not accomplish the problem of accurate and quantitative recovery disposes waste liquid.But the device is shown by the floating ball in each collecting tank
Volume capacity, the liquid then drawn according to ratio in each collecting tank carry out neutralization reaction, can only be to against volume is measured
Know that the waste liquid of pH carries out the neutralization of determined volume, however the acid solution and the pH of lye usually discharged in chemical experiment are not fixed
When, when encountering this problem, which can not then accomplish accurately to neutralize acid waste liquid and alkaline waste liquor.
Invention content
The object of the present invention is to provide a kind of inorganic chemistry liquid waste processing recovery vehicles, and waste liquid is monitored in real time by pH sensors
PH variation, solve the prior art chemical waste fluid processing recovery vehicle, encounter discharge acid solution and lye pH it is unfixed
When, the problem of can not accomplishing accurately to neutralize acid waste liquid and alkaline waste liquor.
A kind of inorganic chemistry liquid waste processing recovery vehicle provided by the invention, the recovery vehicle ontology including double-layer structure are described
The upper strata of recovery vehicle ontology is equipped with recycle of alkali liquor case, neutral solution recycling bins and acid solution recycling bins, under the recovery vehicle ontology
Layer is equipped with blending bin, between the recycle of alkali liquor case and the blending bin, between the acid solution recycling bins and the blending bin
Flow rate of liquid control device is mounted on, the flow rate of liquid control device includes liquid storage bottle, mounted on the liquid storage bottle upper end
Upper tubing, mounted on the lower infusion tube of the liquid storage bottle lower end, in the lower infusion tube flow control switch
And solenoid valve, and the upper tubing is connected with the recycle of alkali liquor case or the acid solution recycling bins, the lower infusion tube
It is connected with the blending bin, filtering absorption layer is installed in the liquid storage bottle；The neutral solution recycling bins and the blending bin it
Between connected by pipeline, the bottom of the blending bin is also communicated with drain pipe, and liquid pump is equipped on the drain pipe；
PH sensors on the madial wall of the blending bin are installed, are internally provided with agitating paddle, under the head cover of the blending bin
Surface is equipped with adsorption layer, and the head cover upper surface of the blending bin is equipped with the electric rotating for controlling the agitating paddle rotation
Machine, is equipped with buzzer and microcontroller on the lateral wall of the blending bin, and the buzzer and pH sensors respectively with institute
State microcontroller series connection.
Preferably, in above-mentioned inorganic chemistry liquid waste processing recovery vehicle, it is described filtering absorption layer by hollow filter screen with
And it is filled in the first active carbon layer composition in the filter screen.
Preferably, in above-mentioned inorganic chemistry liquid waste processing recovery vehicle, the adsorption layer is by hollow filter and filling
Foam-rubber cushion and the second active carbon layer in the filter, the foam-rubber cushion are located under second active carbon layer.
Preferably, in above-mentioned inorganic chemistry liquid waste processing recovery vehicle, the flow rate of liquid that is connected with the acid solution recycling bins
Solenoid valve on control device is the first solenoid valve, and another solenoid valve is second solenoid valve；Pacify on the lateral wall of the blending bin
It is switched equipped with first switch, second switch and third, the first switch controls the opening and closing of first solenoid valve, institute
The unlatching that second switch controls the second solenoid valve is stated, the third switch controls the opening and closing of the electric rotating machine,
The microcontroller and second solenoid valve series connection, and the microcontroller controls the closing of the second solenoid valve.
Preferably, in above-mentioned inorganic chemistry liquid waste processing recovery vehicle, the flow control switch includes forward and backward, upper table
The ladder-shaped frame frame body that face is open, the lower surface of the ladder-shaped frame frame body is horizontal plane, is equipped in the ladder-shaped frame body tiltedly
Slope and pulley, and the pulley is located on the slope, and symmetrical cunning is provided on opposite side in the ladder-shaped frame body
Rail, the pulley rotation are connected on the sliding rail.
Preferably, in above-mentioned inorganic chemistry liquid waste processing recovery vehicle, the bottom of the recovery vehicle ontology is equipped with 4 ten thousand
To wheel.
Compared with prior art, a kind of inorganic chemistry liquid waste processing recovery vehicle of the invention, has the advantages that：
1st, inorganic chemistry liquid waste processing recovery vehicle of the invention requires no knowledge about the acidity for participating in reaction during the reaction
The volume and pH of waste liquid and alkaline waste liquor, it is only necessary to the pH of end reaction liquid is known, accordingly even when encountering the acid solution and alkali of discharge
When the pH of liquid is unfixed, it can still accomplish accurately to neutralize acid waste liquid and alkaline waste liquor.
2nd, absorption layer and the adsorbable gas of adsorption layer are filtered, is reduced environmental pollution, filtering absorption layer can be with impurity screening；
Microcontroller can reaction was completed automatically, and passes through buzzer warning, has reminding alarm effect.
Description of the drawings
Fig. 1 is the structure diagram of inorganic chemistry liquid waste processing recovery vehicle of the present invention；
Fig. 2 is the structure diagram of blending bin in inorganic chemistry liquid waste processing recovery vehicle of the present invention；
Fig. 3 is the structure diagram that absorption layer is filtered in inorganic chemistry liquid waste processing recovery vehicle of the present invention；
Fig. 4 is the structure diagram of adsorption layer in inorganic chemistry liquid waste processing recovery vehicle of the present invention；
Fig. 5 is the structure diagram that flow control switchs in inorganic chemistry liquid waste processing recovery vehicle of the present invention；
Fig. 6 is the module connection figure of inorganic chemistry liquid waste processing recovery vehicle of the present invention.
Reference sign：
1. recovery vehicle ontology, 2. recycle of alkali liquor casees, 3. neutral solution recycling bins, 4. acid solution recycling bins, 5. blending bins, 51. rows
Liquid pipe, 511. liquid pumps, 52.pH sensors, 53. agitating paddles, 54. adsorption layers, 541. filters, 542. foam-rubber cushions, 543. second
Active carbon layer, 55. electric rotating machines, 6. liquid storage bottles, 60. filtering absorption layers, 61. filter screens, 62. first active carbon layers, 7. flow velocitys
Control switch, 71. ladder-shaped frame frame bodies, 72. slopes, 73. pulleys, 74. sliding rails, 8. pipelines, 9. first switches, 91. second switches,
92. third switchs.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Shield range is not restricted by specific implementation.
A kind of inorganic chemistry liquid waste processing recovery vehicle, specifically as shown in figures 1 to 6, the recovery vehicle ontology 1 including double-layer structure,
The upper strata of recovery vehicle ontology 1 is equipped with recycle of alkali liquor case 2, neutral solution recycling bins 3 and acid solution recycling bins 4, recycle of alkali liquor case 2, in
Property liquid recycling bins 3 and the bottoms of acid solution recycling bins 4 be both provided with plug, pass through plug and recycle of alkali liquor case 2, neutral solution controlled to recycle
Whether the waste liquid in case 3 and acid solution recycling bins 4 flows down, and the lower floor of recovery vehicle ontology 1 is equipped with blending bin 5, recycle of alkali liquor case 2 with
Between blending bin 5, flow rate of liquid control device, flow rate of liquid control device are mounted between acid solution recycling bins 4 and blending bin 5
Including liquid storage bottle 6, the upper tubing mounted on 6 upper end of liquid storage bottle, the lower infusion tube mounted on 6 lower end of liquid storage bottle, it is mounted on down
Flow control switch 7 and solenoid valve on woven hose, and upper tubing is connected with recycle of alkali liquor case 2 or acid solution recycling bins 4,
I.e. one of upper tubing is connected with recycle of alkali liquor case 2, another upper tubing is connected with acid solution recycling bins 4, lower infusion tube
It is connected with blending bin 5, filtering absorption layer 60 is installed in liquid storage bottle 6；Pass through pipeline 8 between neutral solution recycling bins 3 and blending bin 5
Connection, the bottom of blending bin 5 is also communicated with drain pipe 51, liquid pump 511 is equipped on drain pipe 51；
PH sensors 52 are installed, blending bin 5 is internally provided with agitating paddle 53, blending bin 5 on the madial wall of blending bin 5
Head cover lower surface is equipped with adsorption layer 54, and the head cover upper surface of blending bin 5 is equipped with the rotation for agitating paddle 53 to be controlled to rotate
Motor 55, is equipped with buzzer and microcontroller on the lateral wall of blending bin 5, and buzzer and pH sensors 52 respectively with monolithic
Machine is connected.
The function of each component in a kind of inorganic chemistry liquid waste processing recovery vehicle provided by the invention：Recycle of alkali liquor case 2, neutrality
Liquid recycling bins 3 and acid solution recycling bins 4 are respectively used to alkaline waste liquor, neutral waste liquid and spent acidic after recycling inorganic polymer composite flocculant
Liquid, blending bin 5 is for the neutralization reaction of alkaline waste liquor and acid waste liquid, and the effect of liquid storage bottle 6 is temporary storage waste liquid, flow velocity
The effect of control switch 7 is the velocity magnitude that waste liquid is controlled to flow down, and filters the existing function of filtering out impurity in waste liquid of absorption layer,
Also have the function of to adsorb escaping gas in waste liquid, the effect of solenoid valve is whether control waste liquid flows down, pH sensors 52
Effect is the pH of liquid in real-time monitoring blending bin 5, and the effect of agitating paddle 53 is mixing liquid.
The operation principle of apparatus of the present invention is as follows：Recycle of alkali liquor case 2, neutral solution recycling bins 3 and acid solution recycling bins 4 are received respectively
After having collected alkaline waste liquor, neutral waste liquid and acid waste liquid, alkaline waste liquor and acid waste liquid are separately flowed into respective liquid storage bottle, so
Neutralization reaction is carried out in blending bin 5 is flowed into afterwards, the variation of liquid pH in blending bin 5, Ran Houliu are detected by pH sensors 52
Speed control 7 coutroi velocity sizes of switch increase the flow velocity of alkaline waste liquor if pH is too small or reduce the flow velocity of acid waste liquid,
Reduce the flow velocity of alkaline waste liquor if pH is excessive or increase the flow velocity of acid waste liquid.Alternatively, we are in advance in blending bin 5
It is put into a certain amount of acid waste liquid and is then placed in alkaline waste liquor or first puts alkaline waste liquor and put acid waste liquid again, neutralize anti-
Should, the monitoring data of pH sensors 52 are transferred to microcontroller, and when the pH of transmission is neutral signal, then microcontroller controls buzzer report
Alert, neutralization reaction terminates.Finally recovery vehicle is moved at total devil liquor recovery, waste liquid, liquid are discharged by drain pipe 51
Body pump 511 can accelerate the discharge of waste liquid.Bottles transparent and with volume markings can be used in liquid storage bottle 6, are provided on liquid storage bottle 6
Air bleeding valve is reacted convenient for measuring quantitative acid waste liquid or alkaline waste liquor.
If producing gas during neutralization reaction, also it can be adsorbed by adsorption layer 54 or be opened up in blending bin 5
Gas vent excludes, if pernicious gas, is then adsorbed, can reduced environmental pollution by adsorption layer 54.If acid waste liquid or
There are impurity or a small amount of escaping gas in alkaline waste liquor, then can be handled by filtering absorption layer.Neutral waste liquid directly flows
Enter in blending bin, do not need to carry out neutralization reaction.The acid waste liquid and alkalinity for participating in reaction are required no knowledge about in the reaction process
The volume and pH of waste liquid, it is only necessary to know the pH of end reaction liquid, accordingly even when encounter discharge acid solution and lye pH it is not solid
When determining, the problem of still accomplishing accurately to neutralize acid waste liquid and alkaline waste liquor.Microcontroller and pH sensors 52 are using existing
There are the microcontroller model and pH sensor model numbers in technology, it will not go into details herein.
In an embodiment of the present invention, filtering absorption layer by hollow filter screen 61 and be filled in filter screen 61 the
One active carbon layer 62 forms.Wherein filter screen 61 has filtration, and the first active carbon layer 62 can be used because with porous structure
Microorganism is adsorbed in adsorbed gas or in advance on the first active carbon layer 62, the volatilization in disposing waste liquid by microorganism
Property gas or harmful substance.
In an embodiment of the present invention, the hollow filter 541 of adsorption layer 54 and 542 He of foam-rubber cushion being filled in filter
Second active carbon layer 543, foam-rubber cushion 542 are located under the second active carbon layer 543.The foam-rubber cushion 542 and second that we select is lived
Property layer of charcoal 543 carries out double-deck adsorption treatment, more better than simple active carbon layer, because foam-rubber cushion 542 and foam-rubber cushion 542
Pore size is inconsistent, stops the path that flows through of gas molecule, and foam-rubber cushion 542 not only can also can in advance be existed with adsorbed gas
Absorption can absorb the chemical reagent of gas on foam-rubber cushion 542, and chemical reagent permanently inhales gas by chemical reaction
It is attached, in this way, foam-rubber cushion 542 is more than the second active carbon layer 543 to the treating capacity of gas, during being flowed on gas, first pass through
542 adsorption treatment of foam-rubber cushion, is adsorbed using foam-rubber cushion 542, and dual adsorption effect is more preferably.
In an embodiment of the present invention, the solenoid valve on flow rate of liquid control device connected with acid solution recycling bins 4 is the
One solenoid valve, another solenoid valve are second solenoid valve；First switch 9,91 and of second switch are installed on the lateral wall of blending bin 5
Third switch 92, first switch 9 control the opening and closing of the first solenoid valve, and second switch 91 controls opening for second solenoid valve
It opens, the opening and closing of 92 control electric rotating machine 55 of third switch, microcontroller and second solenoid valve series connection, and microcontroller controls
The closing of second solenoid valve.With reference to above-mentioned operation principle, in neutralization reaction waste liquid, manually opened first solenoid valve first puts one
Quantitative acid waste liquid closes the first solenoid valve, and then manually opened second solenoid valve, alkaline waste liquor is put into blending bin,
Electric rotating machines 55 are opened by third switch 92, when pH sensors 52 detect that the pH of solution is neutral and are transmitted a signal to
During microcontroller, microcontroller controls the closing of second solenoid valve, stops tapping, reaction terminates, while microcontroller also controls buzzing
Device is alarmed, and reminds operating personnel that reaction terminates.
In an embodiment of the present invention, flow control switch 7 includes the ladder-shaped frame frame body 71 that forward and backward, upper surface is open,
The lower surface of ladder-shaped frame frame body 71 is horizontal plane, and slope 72 and pulley 73 are equipped with, and pulley 73 is located in ladder-shaped frame frame body 71
On slope 72, slope 72 extends in ladder-shaped frame frame body 71 from front surface rearward surface, opposite side in ladder-shaped frame frame body 71
On be provided with symmetrical sliding rail 74, sliding rail 74 is located at 72 top of slope, and the extension line from front to back of sliding rail 74 and slope
Extension line from front to back intersect, pulley 73 is rotatably connected on sliding rail 74.In use, lower infusion tube passes through ladder-shaped frame frame body
71 front and rear surfaces, and between slope 72 and pulley 73, during rolling pulley 73, with the angle change on slope 72, pulley
Lower infusion tube is loosened in 73 compressings, realizes that flow velocity is adjusted, easy to operate, of low cost.Other can certainly be selected commercially available
Flow control switch.
In an embodiment of the present invention, the bottom of recovery vehicle ontology 1 is equipped with 4 universal wheels, recovery vehicle easy to remove.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (6)
1. a kind of inorganic chemistry liquid waste processing recovery vehicle, which is characterized in that the recovery vehicle ontology (1) including double-layer structure, it is described
The upper strata of recovery vehicle ontology (1) is equipped with recycle of alkali liquor case (2), neutral solution recycling bins (3) and acid solution recycling bins (4), described time
The return the vehicle to the garage and knock off lower floor of ontology (1) is equipped with blending bin (5), between the recycle of alkali liquor case (2) and the blending bin (5), the acid
Flow rate of liquid control device, the flow rate of liquid control device packet are mounted between liquid recycling bins (4) and the blending bin (5)
Include liquid storage bottle (6), the upper tubing mounted on the liquid storage bottle (6) upper end, the lower infusion mounted on the liquid storage bottle (6) lower end
Pipe, flow control switch (7) and solenoid valve in the lower infusion tube, and the upper tubing is returned with the lye
It receives case (2) or the acid solution recycling bins (4) connection, the lower infusion tube is connected with the blending bin (5), the liquid storage bottle
(6) filtering absorption layer (60) is installed in；Between the neutral solution recycling bins (3) and the blending bin (5) by pipeline (8) even
Logical, the bottom of the blending bin (5) is also communicated with drain pipe (51), and liquid pump (511) is equipped on the drain pipe (51)；
PH sensors (52) are installed on the madial wall of the blending bin (5), are internally provided with agitating paddle (53), the blending bin
(5) head cover lower surface is equipped with adsorption layer (54), and the head cover upper surface of the blending bin (5) is equipped with to control described stir
The electric rotating machine (55) of paddle (53) rotation is mixed, buzzer and microcontroller, and institute are installed on the lateral wall of the blending bin (5)
It states buzzer and pH sensors (52) is connected respectively with the microcontroller.
2. inorganic chemistry liquid waste processing recovery vehicle according to claim 1, which is characterized in that the filtering absorption layer is in
Empty filter screen (61) and the first active carbon layer (62) composition being filled in the filter screen (61).
3. inorganic chemistry liquid waste processing recovery vehicle according to claim 2, which is characterized in that the adsorption layer (54) is in
Empty filter (541) and the foam-rubber cushion (542) and the second active carbon layer (543) being filled in the filter, the foam-rubber cushion
(542) under second active carbon layer (543).
4. inorganic chemistry liquid waste processing recovery vehicle according to claim 1, which is characterized in that with the acid solution recycling bins
(4) solenoid valve on the flow rate of liquid control device of connection is the first solenoid valve, and another solenoid valve is second solenoid valve；It is described mixed
First switch (9), second switch (91) and third switch (92), the first switch (9) are installed on the lateral wall of mould assembling (5)
The opening and closing of first solenoid valve are controlled, the second switch (91) controls the unlatching of the second solenoid valve, described
Third switch (92) controls the opening and closing of the electric rotating machine (55), the microcontroller and second solenoid valve series connection,
And the microcontroller controls the closing of the second solenoid valve.
5. inorganic chemistry liquid waste processing recovery vehicle according to claim 1, which is characterized in that the flow control switch
(7) the ladder-shaped frame frame body (71) being open including forward and backward, upper surface, the lower surface of the ladder-shaped frame frame body (71) is horizontal plane,
Slope (72) and pulley (73) are installed, and the pulley (73) is positioned at the slope (72) in the ladder-shaped frame frame body (71)
On, symmetrical sliding rail (74), pulley (73) rotation connection are provided in the ladder-shaped frame frame body (71) on opposite side
On the sliding rail (74).
6. inorganic chemistry liquid waste processing recovery vehicle according to claim 1, which is characterized in that the recovery vehicle ontology (1)
Bottom 4 universal wheels are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810068473.3A CN108191032A (en) | 2018-01-24 | 2018-01-24 | A kind of inorganic chemistry liquid waste processing recovery vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810068473.3A CN108191032A (en) | 2018-01-24 | 2018-01-24 | A kind of inorganic chemistry liquid waste processing recovery vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108191032A true CN108191032A (en) | 2018-06-22 |
Family
ID=62590549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810068473.3A Pending CN108191032A (en) | 2018-01-24 | 2018-01-24 | A kind of inorganic chemistry liquid waste processing recovery vehicle |
Country Status (1)
| Country | Link |
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| CN (1) | CN108191032A (en) |
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| CN109211898A (en) * | 2018-09-29 | 2019-01-15 | 侯显英 | A kind of fast automatic detecting method of acid rain |
| CN110529863A (en) * | 2019-08-20 | 2019-12-03 | 潍坊科技学院 | A kind of multiple-effect collection and treatment device for medical test |
| CN113058675A (en) * | 2021-03-26 | 2021-07-02 | 安徽金石创一教育管理有限公司 | Multifunctional teaching experiment table |
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Application publication date: 20180622 |